Erasure-debris collector on typewriters and like machines



Jan. 22, 1952 w. ETTMULLER 2,583,259

ERASURE-DEBRIS COLLECTOR ON TYPEWRITERS AND LIKE MACHINES Fild Nov. 8, 194a I 607mm 1 Patented Jan. 22, 1952 ERASURE-DEBRIS COLLECTOR ON TYPE- WRITERS AND LIKE MACHINES Walter Ettmiiller, Zurich, Switzerland Application November 8, 1948, Serial No. 58,905 In Switzerland November 8, 1947 2 Claims.

My present invention relates to improvements in erasure-debris collectors on typewriters and like machines, and the main object of my improvements is to trap and safely deliver such debris away from the machine so as to prevent same from entering the internal mechanism of the machine.

I attain this and related objects by the auxiliary device shown, by way of example and as applied to a typewriter, in the accompanying drawing, in which Fig. l is a top plan view of the typewriter having a paper carriage which is equipped with a collector according to my present invention, such collector being in the operating position,

Fig. 2 on a larger scale is a cross-section through such collector, platen and paper-feed means, and.

Fig. 3 is a similar cross-section, in which the collector, however, is swung away from the platen.

In the drawing, the numeral l designates the paper carriage, 2 the platen mounted in the latter, and 3 the sheet-feeding and guiding apron. The platen 2 is manually rotatable, as known in the art, by means of the lateral knobs Two angle irons 5, shaped like each other, are rigidly secured to the two narrow sides of the paper carriage i and each comprises a depending leg 6, which latter is provided with an open-ended slot l. Thus, two housings or bearings are provided for receiving an apron i} which comprises a collecting-channel 9 circularly arched in cross-section and terminating in an upstanding lug 9'. The center line of the channel 3 coincides with the axis of rotation of the apron 8, which axis runs parallel to the platen 2. The apron 8 generally is of the same length as the platen 2, but its longitudinal edge adjacent to the platen is somewhat shorter. Collars I0, each provided with a journal, are secured to the lateral ends of the collecting-channel 9, and the apron 8 is loosely inserted by means of the said journals in the housings l of the legs 6 of the two angle irons 5, and thus rotatably mounted in the latter.

In Figs. 1 and 2, the apron 8 is shown in the position of use, being disposed within the of the platen Z and abutting, through its free longitudinal edge, against the paper sheet A which is engaged with the surface of the platen 2. The position of use of the apron 8 is so selected that the latter always is arranged abcve a line of writing on the sheet A, when the typewriter is in action. When erasing, the sheet A is so adjusted by means of the platen, if required, that the point of erasure is arranged above the apron 8. The retainer i i, which holds the paper sheet A in contact with the platen .2, with the two sheet-engaging rollers I2 then may be swung back into its inactive position (Fig. 2). 6

*' Number 2 into the collecting-channel 9, the lug 9' facilitating such sweeping action. The apron 8 is then swung away from the platen 2 into the position shown in Fig. 3, in which its free longitudinal edge abuts against a bar i3 of the paper carriage l, and the retainer II is swung back into its sheet-engaging position (Fig. 3). The paper sheet A and the platen 2 then are re-adjusted into their appropriate position on the paper carriage for resuming the typewriting operation.

For the purpose of removing the debris from the collecting channel 9, the apron 8 is removed from time to time from its two housings 'l' on the paper carriage I. At least one of the two collars ii] provided with journal pins and closing the ends of the collecting-channel 9, suitably is made withdrawable. By removing the said collar It, the collecting-channel 9 is opened at the respective end, thus facilitating the removal of the debris from the channel 9.

When debris has been collected in the channel 9 of the apron a in such amount that it drops out of the channel 9 over the lug 9, in the inactive position of the apron 8 (Fig. 3) the lug 9 will conduct the debris away from the internal mechanism of the machine, 1. e. onto the keyboard where it does no harm.

What I claim and desire to secure by Letters Patent, is:

1. In combination with a typewriter or the like machine having a carriage and a platen, an erasure-debris collecting device swingably mounted on the carriage, and extending in the direction of the platen, the collecting device being formed with a collecting trough from which two arms extend angularly disposed to each other, one of which arms serves as an apron lying against the platen when in operative position for collecting debris and against the carriage when swung to non-operative position.

2. The combination according to claim 1, and a bracket mounted on the carriage and open at the top, the ends of the collecting trough of the collecting device being provided with mounting heads at least one of which is inserted in the bracket when assembled, at least one of said heads being removably disposed in said trough.

WALTER ETTMULLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Egger Aug. 6, 1907 McNeal June 30, 1925 FOREIGN PATENTS Country Date Germany June 28, 1907 Number 

